Please answer A and B thank you!!

Marginal tax rates. Using the tax rate schedule given here B. perform the following: a. Find the marginal tax rate for the following levols of sole proprietorship earnings before taxes: $14,800,$61,000,$91,900;$152,000,$241,000;$450,400; and $1 million. b. Plot the marginal tax rates (measured on the y-ixis) against the pretax income leveis (measured on the x-axis). a. The marginat tax rate for eamings before taxes of $14,800 is (Round to the nearest integer.)